Rolling-mill.



I. G. BIGGBRT, JB.

7 ROLLING MILL.

. I v L Q ugmonron FILED 1111134, 1910. W I 984,345.; v "Patented Feb-14,1911.

3 SHEETS-SHBET 2.

k CIfVSNTIOR P. 0. BIGGERT ROLLING MILL.

APPLICFATIOH IILED JUNE 4, 1910. I

a sums-5112mm 9, n I, o J

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N n Q 0 WITNESSES "mvl-iNTon Patented Feb. 14, 1911.

P. 01 111111111111, JR.

ROLLING MILL. APPLIOATION FILED 111111: 4,1910.

Patented Feb.14,1911.

INVENTOR 1%wwi UNITED STATES PATENT "'oFF oE. v

'rLonENen o. BIGGERT, n, or rrrrsnnne, PENNSYLVANIA, ASSIGNOR 'rp UNITED ENGINEERING & FOUNDRY ooMPaNY, orrrrrsnnne, PENNSYLVANIA, A eon- IPORATION OF PENNSYLVANIA.

' ROLLING-MILL.

Toall whom it may concern:

Be it known that I, FLORENCE C. BIGGERT,

J r., resident of Pittsburg, Allegheny county,

Pennsylvania, have invented a new and use ful Improvementin Rolling-Mills, of which the followingisa full, clear, and exact description, reference being had'to the accompanying drawings, forming part of this Y specification, in which Figure 1 is a side View showing a portion of a rolling mill having my inventlon applied thereto, the tables-being shown in their lowered positions. Fig. 2 is a similar view with certain of the parts removed, showing thetables in their raised positions, Fig. 3

' is a sectional plan View showing the table and middle roll actuating'parts.

Fig. 4 is w a detail] view showing a modification.

effectuallyshiftthe'Iniddle roll and-the roll tables without undue "shoeks dr jars on the parts I I The nature 'of'myinvention, willbe best understood by reference to the drawings, in

I which I have shown thepreferredembodi:

ment thereof, and-which ;will now be ..de-'

'- scribed, it being premised, however, i=that various changes canlbe madej in. the. details of the construction and. arrangement of the parts without departing scope v of; my invention as define in the claims.

Referring to the drawings, the numeral I Q designates. the housing of a three-high r011 'ing mill 3 the upper roll; 4the vertically movable middle, roll, and '5 the lower. roll.

I 6 and7 designate the two rolltables, which may be. of any us'ual' or suitable character. v

The middle roll .t-issupported.at its} ends in suitable bearings 8, which arecarried by.

' fthe levers 9 sup c ted by links lOf-from the so. 11 with an arm of a lever member 12 which is pivoted "atj13, andfi'which has a curved tables'fi and 7 roll,- housing. ne arm ,of each. lever 1 9 is connected by downwardly extending link slot 14 therein." a

are arranged to Specification of Letters Patent. Application filed J1me 4, 1910, Serial No. 565,085. r

from the spirit-and I raised and lowered by an electric motor 15,

which drives a gear wheel 16 on a erank shaft 17. A pitman 18 connects the crank of the shaft 17 with the lower portion of a lever 19, which is secured at itsupper end to a transversely extending rock shaft 20. This rock shaft has two or more crank arms 21, which are connected to the rear ,end of portion of the lever 19 is connected by a link 23 with a dependinglever arm of a transverse rock shaft 25. The upper end of PatentedFeb. 14, 1911.

the table'7 by links 22. The intermediate the lever-arm 24:. is connected by a link 26 with a de ending lever arm 27 which is-.se cured at Its upper end to a transverse, rock shaft 28 extending underneath the table 6 and having two or more crank arms 29 forward end portion of the table 6; The lower end of the lever 27 is connected by a link 30' with a depending lever arm 31 of a rock shaft 32, parallel withthe shaft 28, and which has cranks or lever arms 33 which are, connected, with depending portions 34 :at therear end'of the table 6. The rock shaft 25 also has lever .arms 35, which are the forward end portion of the table 7,.

,Said shaft 25 also has a depending leverarm 37 whichis connected by rod 38 witha 'pin' 39, which is arranged to slide in the curved slot .14 of the'lever. member 12 before I des ribed, ;and to which is connected a weight 40 by means .of a link 41.

tion fo'f' the weight and secured to a fixed point 43 on the bed of'the mill. 5

which are connected by the links 30 with the.

connected by links 36 with the under side of 42jis a l'nk {connected to the upper end per v 44 a guide arm loosely sleeved on the shaft 25 and connected to'the under side of theien d portion ofthe table 7.

. 45 in Fig. 1 designates cylinders of the that connection may be maintained with a.

source of constantpressnre. This pressure 9.5. usual character, forming a counterbalance "for the tables 6,and 7'. The cylinders-45 are is; suificient to normally ,carry substantially the entire weight of the tables, thus reduc I ing the work required of them0tor15. The pivot connections, are used to allow the cylm- I ders and, their plungers. tov accommodate themselves to the m'oVements-of the tables. 7

20 almost directly underneath the centers 13'on Inthe operation of the mill, when the tables go up, the middle roll must move down, and when the tables move down the middle roll must move up. When. the parts are in the position shown-in Fig. '1, 'the' middle roll is shifted to its upward position through the connections descrlbed, as will be readily seen, and is held in such position by the action of theweights 40, which are pulling upon the righthand end portion of the lever members 12. When, however, the motel. is operated to lower the tables, bringin' the i pitman- 18 and lever -19 into the posltion I shown in Fig. 2, and the connections operhas that the weights are shifted to a ated from the lever 19 are moved into position shown in Fig. 2 to cause the tables to rise, the movement of the shaft 25 actuates the rods 38 to move the pins 39 to theleftvhand ends of the slots 14 of the lever members 12. In this position the-pins 39 are which the lever members 12 are pivoted, and therefore they cease to exert any lifting-action on the middle roll, and the latter falls by gravity to its lower position. The move ments of the table and middle roll are gradual', being eased by'the system of levers and weights and without injurious shock to any of the arts. 30 P It Wlll be understood from the foregoing that whenthetables fall,'the lever members 12 are actuated to raise the'middle roll, and 0 tion in' which they overbalance the middle roll and hold it in its raised position; and

-that when the tables rise, the'weights are shifted to such a position relatively to the .centerof the lever members 12 that the middle roll is unbalanced, and is causedv to descend and fall by its own weight.

Instead of a weight, I may employ other force exerting means. .Thus, in Fig. .4 I 'haveshownamodi'fication in which .a power cylinder 46'is substituted for the weight.

This cylinder is' fi xed .to a suitable support 47; It has a piston 48 which is connected 49/00 the lever 42. The upper por- ',tion of the cylinder is connected to an ac- I eumujlator (not shown), 01; other source of constant power.

and arrangement of the system of levers, by 'WhlCh the necessary movements are efi'ected; that var ous' ;for-ms of motors may be employed' for operat'ingthe tables; and that the-weight-Iorcylinder may be' replaced by .anyothersuitade constantly acting force.

Instead of causing the means for overb'alancing and unbalancingthe roll to be actuated by the tab le actua't-ing mechanism, it is obv ousthat such means-may be shifted in various other ways such as anindepe'ndent motor, orjoth'er independent source of power.

These and-many othcr'changes may be made It. will be obvious that various changes may be made .in'the details of construction.

in the details'of the apparatus without departure from my invention as defined in the appended claims.

What I claim is 1. In a rolling mill, the combination with a table movable in a verticalplane, and a vertically movable roll, of mechanism for raising a'nd lowering the table, and means operatively connected with the tablev actuating mechanism and arranged to have its point of application shifted by the movements of the table-actuating mechanism to f alternately overbalance and unbalance the movable roll; substantially as described.

2. In a three high rolling mill having a vertically movable middle roll, and vertically movable tables, the combination with the table-actuating'mechanism and connections between said actuating mechanism and the middle roll, of a weight, and connections between the weight and the .table actuating mechanism whereby the point of application of the'weight is shifted to alternately overbalancev and unbalance said middle roll; substantially as described.

3. In a rolling mill, the combination with v A a vertically movable roll, and vertically movable tables, of a-movable carrier for the mid dle' roll, a lever connected tosaid carrier, a' weight having a shiftable connection with said lever, and table actuating means a'r-,

ranged to effectthe shifting of the pointof application of said-weight with respect'to the-pivotal axis'of the lever; substantially as described.-

4. In a rolling mill, the combination with a vertically movable roll, a vertically movable carrier for the roll,-and vertically movable tables, of a table actuating motor, a system of links and levers actuated by the motor and connected to the tables. for efi'ect.

ing. the raising. and lowering thereof, a

weight shiftably connected to the movable roll,.and connections between said weight and the"link and lever-system for shifting the point of application of said weight into positions where it alternately over'balances and imbalances said roll; substantially as 1 described. p U

5. In a three-high rolling mill, the combination with a vertically movable middle roll and vertically movabletables, of pivoted carriers for the middle roll, slotted lovers connected to said carriers, weights suspendedfrom the slotted levers, link and lever mecha-- nism' for effecting thcraising and lowering of the tables, and connectlons between said for shifting the points 'of application of the wveights and the link and lever mechanism weights with respect to the pivotal axes of said leverssubsiantially 'as'described.

6:- In a. threehigh-mill, the combination with a vertically movable middle-roll, and

, vcrtically'movablc tables, ofamotor for. ac-' tuatingthe tables, alink and leversystem said shiftable weight and the link and lever mechanism for shifting the point of application of the weight to positions in which it either over-balances or unbalances the, midi dle roll; substantially as described.

, 7. In a rolling mill, the combination with a table movable in a vertical plane, .anda vertically movable roll, of mechanism r'or raising and lowering the tables, and aweight operatively connected with the table actuatting mechanism and arranged to have its point of application shifted by the movements of the table-actuating mechanism to alternately overbalance and unbalance the movable roll; substantially as described.

8. Ina rolling mill, the combination with a vertically movable roll,,and vertically 'movable tables, of a movable carrier for the middlc roll, a lever connected to said carrier, a

force-exerting means having a shiftable 0on "lever mechanism,

nection with said lever, and table-actuating mechanism arranged to shift the point of ap 'plieation of said meansvvith respect to the pivotal] axis of the lever; substantially as described. a v

9. A rolling mill having a vertically movr able roll, a lever mechanism connectedtherea force-exerting device connected to the and means for shifting the application of saiddevice to the point of lever. mechanism to alternately unbalance and overbalance the roll; substantially as described. r

" 10. A rolling mill having a vertically movable roll, a force-exerting means, and motive means for shifting the point of application it to alternately unbalance and overbalanee the roll; substantially as described.

In testimony whereof, I have hereunto set my hand.

FLOREN Witnesses H. M. GoRwIN,

GEo. H. PARMELEE.

E o. BIGGERT, JR.

' of the force-exerting means to thereby cause 

